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9

UK

KICK-BACK PRECAUTIONS

See Figures 4 and 5.

Rotational kick-back (

A

) occurs when the moving chain contacts

an object at the Kick-back Danger Zone (

B

) of the guide bar.

The result is a lightning-fast, reverse reaction which kicks the
guide bar up and back towards the operator. This reaction may
cause loss of control which can result in serious injury.

FUEL AND REFUELLING

HANDLING THE FUEL SAFELY

WARNING:

KICK-BACK occurs when the moving chain contacts an
object at the upper portion of the tip of the guide bar or
when the wood closes in and pinches the saw chain in
the cut. Contact at the upper portion of the tip of the
guide bar can cause the chain to dig into the object
and stop the chain for an instant. The result is a
lightning-fast, reverse reaction which kicks the guide bar
up and back toward the operator. If the saw chain is
pinched along the top of the guide bar, the guide bar can
be driven rapidly back towards the operator. Either of
these reactions may cause you to lose control of the saw,
which could result in serious injury

Do not rely exclusively upon the safety devices built into
your saw. As a chainsaw user, you should take several
steps to keep your cutting jobs free from accident or injury.

WARNING:

Always turn off engine before refuelling. Never add fuel
to a machine with a running or hot engine. Move at least
15 m (50 ft.) from refuelling site before starting the engine.
DO NOT SMOKE! Failure to heed this warning can result
in possible personal injury.

Always handle fuel with care: it is highly flammable.

Always refuel outdoors and do not inhale fuel vapour.

Do not let petrol or oil come in contact with skin.

Keep petrol and oil away from the eyes. If petrol or oil comes
in contact with the eyes, wash them immediately with clean
water. If irritation is still present, see a doctor immediately.

Clean up spilled fuel immediately.

WARNING:

Check for fuel leaks. If any are found, correct them before
using the saw to prevent fire or burn injury.

}

50:1

FILLING THE TANK

See Figure 6.

Refer to “Specific Safety Rules – Refuelling” earlier in this
manual for additional safety information.

1.

Clean the surface around fuel cap to prevent contamination.

2.

Loosen the fuel cap slowly.

3.

Carefully pour the fuel mixture into the tank. Avoid spillage.

4.

Prior to replacing the fuel cap, clean and inspect the gasket.

5.

Immediately replace the fuel cap and hand tighten. Wipe up
any fuel spillage.

NOTE:

 It is normal for the engine to emit smoke during and

after the first use.

MIXING THE FUEL

This product is powered by a 2-cycle engine and requires
pre-mixing petrol and 2-cycle oil. Pre-mix unleaded petrol
and 2-cycle engine oil in a clean container approved for petrol.

This engine is certified to operate on unleaded petrol
intended for motor vehicle use with an octane rating of
87 ([R + M] / 2) or higher.

Do not use any type of pre-mixed petrol/oil from fuel service
stations. This includes the pre-mixed petrol/oil intended for
use in mopeds, motorcycles, etc.

Use a high quality 2-cycle self-mixing oil for air-cooled
engines. Do not use motor vehicle oil or 2-cycle outboard oil.

Mix 2% oil into the petrol. This is a 50:1 ratio.

Mix the fuel thoroughly each time before refuelling.

Mix in small quantities. Do not mix quantities larger than
usable in a 30-day period. A 2-cycle oil containing a fuel
stabiliser is recommended.

1 Litre

+

20 ml

=

2 Litres

+

40 ml

=

3 Litres

+

60 ml

=

4 Litres

+

80 ml

=

5 Litres

+

100 ml

=

CHAIN OIL SYSTEM

See Figure 7.

Use RYOBI Bar and Chain Oil.

 

It is designed for chains

and chain oilers, and is formulated to perform over a wide
temperature range with no dilution required. Chainsaw should
use approximately one tank of oil per tank of fuel.

OPERATION

Summary of Contents for PCN3840

Page 1: ...ured to Ryobi s high standard for dependability ease of operation and operator safety Properly cared for it will give you years of rugged trouble free performance WARNING To reduce the risk of injury...

Page 2: ...e and knowledge and should be performed only by a qualified service technician When servicing use only identical Ryobi replacement parts For safe operation read and understand all instructions before...

Page 3: ...handle and your left hand on the front handle with your thumbs and fingers encircling the chainsaw handles A firm grip together with a stiff left arm will help you maintain control of the saw if kick...

Page 4: ...roper tool is used to hold the flywheel in order to remove the clutch structural damage to the flywheel could occur and subsequently cause the flywheel to burst KEEPSAFE T TIP ANTI KICK BACKNOSEGUARD...

Page 5: ...felling a tree requires a larger work area than making other cuts i e bucking cuts etc PUSH AND PULL The reaction force is always opposite to the direction the chain is moving Thus the operator must b...

Page 6: ...and head protection when operating this equipment The SAFE T TIP nose guard on the guide bar helps prevent kick back No smoking sparks or open flame when mixing fuel or filling the fuel tank Hold and...

Page 7: ...s Fuel tank capacity 20 25 oz 19 4 oz Oil tank capacity 12 3 oz 11 8 oz Bar lengths 41 50 cm 16 20 in Chain pitch 8 26 mm 325 in Chaingauge 1 27 mm 050 in Chain type Semi Chisel LoPro Drive sprocket 7...

Page 8: ...a kick back reaction by preventing the cutters from digging in too deeply at the kick back zone Only use replacement chain that is equivalent to the original chain or has been certified as a low kick...

Page 9: ...them immediately with clean water If irritation is still present see a doctor immediately Clean up spilled fuel immediately WARNING Check for fuel leaks If any are found correct them before using the...

Page 10: ...nit Never squeeze and hold the throttle trigger while the chain brake is in the brake position CAUTION Failure to release partial throttle when chain brake lever is in the brake position will result i...

Page 11: ...ut a cutting load may result in unnecessary wear to the chain bar and engine 7 Do not put pressure on the saw at the end of the cut WORK AREA PRECAUTIONS See Figure 21 Cut only wood or materials made...

Page 12: ...s B Clear out the undergrowth around the tree to be felled C Do not cut trees near electrical wires or buildings D Consider the direction in which the tree leans E Check the tree for damaged or dead b...

Page 13: ...t touching the chain you should use the wedge to hold the cut open to prevent pinching NOTE When bucking or felling with a wedge you may need to remove the SAFE T TIP anti kick back device to allow th...

Page 14: ...ng that the bar pin groove is at the bottom with the upper and lower edges angled away from the guide bar 12 Replace the clutch cover and bar mounting nuts ASSEMBLING THE BAR AND CHAIN See Figures 3 a...

Page 15: ...sion the chain prior to sharpening NOTE Refer to Maintenance Adjusting the Chain Tension earlier in this manual 3 Use a 4 mm 5 32 in diameter round file and holder Do all your filing at the midpoint o...

Page 16: ...the tightness of the mounting screw before each use Tighten the mounting screw A of the nose guard as instructed below These are specially hardened screws If you cannot install the screw tightly repla...

Page 17: ...o restore performance We highly recommend that only qualified service technicians perform this service CHECKING THE FUEL FILTER See Figure 70 Check the fuel filter A periodically Replace it if contami...

Page 18: ...ion switch to run I position Push and fully release primer bulb 7 times Pull starter three times with choke lever at run If engine does not start move choke lever to choke and repeat normal starting p...

Page 19: ...and chain for damage NOTE The carburettor adjustment needle s are equipped with plastic cap s which prevent anticlockwise rotation from the original factory adjustment If your product exhibits specif...

Page 20: ...by the following approved body SLG Pr f und Zertifizierungs GmbH Certyfikat nr 100885D SLG Pr f und Zertifizierungs GmbH Certyfikat nr 100889O To effect correct application of the health and safety re...

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